Thanks for this ! I have read that a leisure battery subject to a drop test should be disconnected for at least two weeks before starting the test as a good battery will hold its charge for weeks if not months, yet a battery with limited capacity will still hold a full charge for quite a while after being fully charged and doing a drop test within a short time after charging will give a false result. Do you agree with that premise ?
I think you will find that Lead Acid, AGM & Gel are all lead based batteries. I've not heard of lead carbon Gel batteries and wonder if they could be Pure lead Carbon sold at a higher price ????? The leisure battery market place is in such a mess with so much mis selling and utter crap out there !
I have another question for you (Sorry to be a pain in the rear mate!). What's the purpose of measuring the voltage after letting the battery stand for 30 minutes after removing the load and what do you do with the result (what result should you see and what if its lower than expected ? what then ?)
99% pure lead plus carbon similar to the agm variants, 5 year guarantee, 1500 cycles at 50% dod, 15 year design life. The advantage over agm is they can be charged from -20 C the agm ones say charge from 0 C, the disadvantage from agm is they can't be charged as quickly, but still quicker than regular lead acid or gel. I bought mine from alpha batteries £169.98 each. I thought them worth a try as I have sisters who live in the alps where it regularly gets down to -16C in the winter.
The problem lem with a drop /CCA test is it is designed to measure short term high current capability which is the opposite of what you want for leisure use.
You are always a pain Phil unless you are buying me €1 beers or talking to 'er indoors about birding.
I agree with that ! I'm not sure of the math though so will seek advice elsewhere.You are always a pain Phil unless you are buying me €1 beers or talking to 'er indoors about birding.
If testing that way and the voltage is lower that expected, the battery no longer has its full capacity and from the results you should be able to guesstimate how much capacity it has lost.
I understand this Lenny but that's not what I asked you ! I will seek confirmation or otherwise from elsewhere. Thanks for responding.
Virtually what I said.
What A&N suggest is a too lower load for a real live test you need to test them with a load that draws 5 to 10 amps as that is more typical of the real life use. in. Also you will get a better idea of there condition if you do it in 25% stages like I suggested eairler.
You're going to be sorry you said that
Here's how to do it.
Agreed, I have a 55 W bulb and will use that. (4.6 Amps)
Tayna is local to me, good company. I note from their website they are not selling these on the leisure batteries page, but have at least equivalent cost batteries on that page. Any guess as to why they would not be selling these as suitable?Your going to get a lot of different advice on here ! A lot of it good, some of it bad and whilst I generally agree with Lenny HB about AGM leisure batteries, there is a new type of AGM leisure battery that IMO is worth considering. Pure Lead Carbon batteries. These are cheaper than Gel batteries. (Gel batteries would last longer though !), They have a much longer life than your standard AGM batterie and can be safety discharged to a much lower lever than a standard AGM battery without any long term damage. There are quite a few manufacturers producing them now and I'll attach a link for one as to give you some idea what there all about.
As Lenny says if your on hook up all the time any old knackered 12 Volt lead Acid battery will do.
Leoch Pure Lead Carbon AGM 12V 100Ah Battery (PLH+C 100)
The Leoch PLH+C 100 AGM Battery. Designed for solar, golf, lighting, industrial, leisure applications and much more. More power than your lead WET acid batteries and has faster charging abilities. 12V 100Ah power output. Dimensions - 341.5L x 175W x 213Hwww.tayna.co.uk
Nope! However, if your interested in these types of batteries I would suggest you have a look at the Victron Pure Lead Carbon Battery. https://www.batterymegastore.co.uk/...d-carbon-battery-12v-106ah-mate-bat612110081/
I had a look at the Tayna website and it seems to me that they have no stock of lead carbon leisure batteries, all the ones they do have, have cold cranking amps defined in the tech specs, all the ones that have no cca defined are out of stock.
It's not me,,I am not that rudeAlthough my agm’s lasted 7yrs I did replace them with gels… only because of the chances that I got lucky with the agm’s….
incidentally, I can’t see all the posts on this threadI think someone has me on ignore…
BUSBY.
Nope I'm on holiday.
It's not me, if I ignored you there would be no fun in taking the piss out of you for that terrible wine you gave me.Although my agm’s lasted 7yrs I did replace them with gels… only because of the chances that I got lucky with the agm’s….
incidentally, I can’t see all the posts on this thread
A lot longer than they did for me, totally unsuitable as a leisure battery.
I thought you were on holiday LOL!. It's my understanding that you can not accurately measure a battery when you have a load on it ! We shall see how well and by how much it recovers when I remove the load at 2.pm. The batteries have been in use since 2018 and subject to a fair bit of wilding and hook up and with 245 W of solar panel. I too am looking forward to the end result. Fingers crossed.
Only if the failed one is AGM otherwise the alternator may not charge it properly as it will built for lead acid charge voltage
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